Allah's Messenger said: "All of the earth is a Masjid except for the graveyard and the washroom."
Jami` at-Tirmidhi Book 2, Hadith 169
← Previous Hadith Allah's Messenger said: "When one of you comes to the Masjid, then let him perform two Rak'ah before sitting."

Jami` at-Tirmidhi Book 2, Hadith 168 Next Hadith → he heard Allah's Messenger say: "Whoever builds a Masjid for (the sake of) Allah, then Allah will build a similar house for him in Paradise."

Jami` at-Tirmidhi Book 2, Hadith 170